Flueric partial pressure sensors

Details Flueric partial pressure sensors Flueric partial pressure sensors

G - Physics

01

L

324/25.5

G01L 9/02 (2006.01) G01N 7/00 (2006.01)

Patent

CA 1162984

ABSTRACT OF THE DISCLOSURE Title: "Improvements in or Relating to Flueric Partial Pressure Sensors" A flueric partial pressure sensor includes a flueric bridge having two bridge legs adapted for sensing a reference-gas and sample-gas mixture. A linear resistor and an orifice resistor are incorporated in each of the bridge legs which are conjoined to discharge from a single outlet. The resistors are arranged to provide an asymmetric balance of the flow rates through the bridge legs. The asymmetric balance is selected so that in operation a constant pressure output signal is generated for a chosen partial pressure of a constituent gas of the sample-gas mixture in varying absolute pressure conditions such as changes in altitude. Respective pressure signal outlets connected one with each bridge leg at a position between the linear resistor and the orifice resistor are used to effect control of a flueric laminar flow proportional amplifier.

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